23642687 has 2 divisors, whose sum is σ = 23642688. Its totient is φ = 23642686.

The previous prime is 23642681. The next prime is 23642713. The reversal of 23642687 is 78624632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23642687 - 2⁶ = 23642623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23642687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23642681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821343 + 11821344.

It is an arithmetic number, because the mean of its divisors is an integer number (11821344).

Almost surely, 2^23642687 is an apocalyptic number.

23642687 is a deficient number, since it is larger than the sum of its proper divisors (1).

23642687 is an equidigital number, since it uses as much as digits as its factorization.

23642687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 23642687 is about 4862.3746256330. The cubic root of 23642687 is about 287.0112659322.

The spelling of 23642687 in words is "twenty-three million, six hundred forty-two thousand, six hundred eighty-seven".